The new update 126.96.36.199 just released has the new CrossOver wrapper included. You only need to do the COMPLETE uninstall if you were experiencing any freezing issues running under Sierra. If you simply update within the program you will update the Rootsmagic version but not the CrossOver wrapper.
Here are the steps for the complete uninstall.
Drag-and-drop the RootsMagic application icon to your trashbin.
In Finder, select Go > Go to Folder
Type "~/Library/Application Support"
Drag the folder labeled "RootsMagic" to the trashbin.
I do recommend if you are a Mac user, and feel comfortable doing a complete uninstall, that you do so regardless of having freezing issues. Then you will be completely up-to-date with the Mac version.